Superconductivity in the americium metal as a function of pressure: Probing the mott transition

J. C. Griveau, J. Rebizant, G. H. Lander, B Kotliar

Research output: Contribution to journalArticle

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Abstract

High-pressure measurements of the resistivity of americium metal are reported to 27 GPa and down to temperatures of 0.4 K. The unusual dependence of the superconducting temperature (Tc) on pressure is deduced. The critical field [HC(0)] extrapolated to T = 0] increases dramatically from 0.05 to ∼1 T as the pressure is increased, suggesting that the type of superconductivity is changing as pressure increases. At pressures of ∼16 GPa the 5f electrons of Am are changing from localized to itinerant, and the crystal structure also transforms to a complex one. The role of a Mott-type transition in the development of the peak in Tc above 16 GPa is postulated.

Original languageEnglish (US)
Article number097002
JournalPhysical review letters
Volume94
Issue number9
DOIs
StatePublished - Mar 11 2005

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americium
superconductivity
metals
pressure measurement
electrical resistivity
crystal structure
temperature
electrons

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

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abstract = "High-pressure measurements of the resistivity of americium metal are reported to 27 GPa and down to temperatures of 0.4 K. The unusual dependence of the superconducting temperature (Tc) on pressure is deduced. The critical field [HC(0)] extrapolated to T = 0] increases dramatically from 0.05 to ∼1 T as the pressure is increased, suggesting that the type of superconductivity is changing as pressure increases. At pressures of ∼16 GPa the 5f electrons of Am are changing from localized to itinerant, and the crystal structure also transforms to a complex one. The role of a Mott-type transition in the development of the peak in Tc above 16 GPa is postulated.",
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Superconductivity in the americium metal as a function of pressure : Probing the mott transition. / Griveau, J. C.; Rebizant, J.; Lander, G. H.; Kotliar, B.

In: Physical review letters, Vol. 94, No. 9, 097002, 11.03.2005.

Research output: Contribution to journalArticle

TY - JOUR

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T2 - Probing the mott transition

AU - Griveau, J. C.

AU - Rebizant, J.

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AU - Kotliar, B

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AB - High-pressure measurements of the resistivity of americium metal are reported to 27 GPa and down to temperatures of 0.4 K. The unusual dependence of the superconducting temperature (Tc) on pressure is deduced. The critical field [HC(0)] extrapolated to T = 0] increases dramatically from 0.05 to ∼1 T as the pressure is increased, suggesting that the type of superconductivity is changing as pressure increases. At pressures of ∼16 GPa the 5f electrons of Am are changing from localized to itinerant, and the crystal structure also transforms to a complex one. The role of a Mott-type transition in the development of the peak in Tc above 16 GPa is postulated.

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